(laughter) because barack obama isn't just wrong for the nation, he's wrong for creation. so, god, remember. on november 6-- a day which you are already in and will always be in for a time of eternity-- vote mitt romney. but bring photo i.d. because they're really cracking down. i'm stephen colbert and i pray this message. we'll be right back. (cheers and applause) (cheers and applause) >> stephen: welcome back, everybody, my guest tonight has written a new book which he describes as an existential detective story. he never tells you who did it because what's the point? please welcome jim holt! (cheers and applause) hey, what's going on there, mr. molt? nice to see you! is it mr. molt, dr. holt? >> mr. holt. >> stephen: okay, you're not one of those fancy doctors of thought guys. >> i'm a drop dropout. >> stephen: good. you're an essayist and a critic on philosophy, mathematics and science and you have a new book called "why does the world exist: an existential detective story." >> you say that sarcastically. (laughter) >> stephen: that's as sincere as i get. (laughter) fi